A resistance of 4 Omega and a wire of le...

A resistance of `4 Omega` and a wire of length 5 meters and resistance `5 Omega` are joined in series and connected to a cell of e.m.f. `10 V` and internal resistance `1 Omega`. A parallel combination of two identical cells is balanced across `300 cm` of wire. The e.m.f. `E` of each cell is

`1.5V`

`3.0V`

`0.67V`

`1.33V`

Text Solution

Verified by Experts

The correct Answer is:

`E=pil=(Vl)/L=(iR)/LxxIimpliesE=E/(R+R_(h)+r) xxR/L xxl`
`implies E=10/(5+4+1) xx5/5xx3=3V`

Topper's Solved these Questions

TEST PAPERS
RESONANCE|Exercise FST-3|30 Videos
TRAVELLING WAVES
RESONANCE|Exercise Exercise- 3 PART II|7 Videos

Similar Questions

Explore conceptually related problems

A voltmeter has a resistance of 50 Omega is connected across a cell of e.m.f. 2V and internal resistance 10 Omega . The reading of voltmeter is

A voltmeter has resistance of 100 Omega . What will be its reading when it is connected across a cells of e.m.f 2 V and internal resistance 20 Omega ?

The wire of potentiometer has resistance 4 Omega and length 1m. It is connected to a cell of e.m.f. 2V and internal resistance 1 Omega . The current flowing through the potentiometer wire is

The wire of potentiometer has resistance 4Omega and length 1m . It is connected to a cell of emf 2 volt and internal resistance 1Omega . If a cell of emf 1.2 volt is balanced by it, the balancing length will be

The wire of potentiometer has resistance 4Omega and length Im. It is connected to a cell of EMF 2V and internal resistance 1Omega . Ifa cell ofEMF 1.2V is balanced byit, the balancing length will be:

A potentiometer wire of length 1m and resistance 20 Omega is connected in series with a 15V battery and an external resistance 40 Omega . A secondary cell of emf E in the secondary circuit is balanced by 24 cm long potentiometer wire. The emf E of the cell is ,

A potentiometer wire, 4 m long and resistance 10 Omega , is connected in series with a resistance of 1988 Omega and a cell of emf 2V and internal resistance 2Omega . What is the potential gradient along the wire?

RESONANCE-TEST SERIES-PHYSICS

A cylinder is filled with a liquid of refractive index mu. The radius ...
Text Solution
|
A point charge q is placed inside a conducting spherical shell of inne...
Text Solution
|
A resistance of 4 Omega and a wire of length 5 meters and resistance 5...
Text Solution
|
A satellite is launched into a circular orbit of radius R around the e...
Text Solution
|
The pitch of a screw gauge is 1 mm and there are 100 division on its c...
Text Solution
|
A copper rod and a steel rod of equal cross -sections and lengths (L) ...
Text Solution
|
The left plate of the capacitor shown in the figure above carries a ch...
Text Solution
|
A ray of light falls normally on one face of a right angled prims of r...
Text Solution
|
A particle is moved inx-y plane form (a,0) to (0,a) along circular arc...
Text Solution
|
In the given situation, for what value of i, the incidence ray will re...
Text Solution
|
A circuit is shown below. If A is an ideal ammeter, B an ideal Ba...
Text Solution
|
In the circuit, V is potential differences across the terminal as shwo...
Text Solution
|
Find the ratio of charges on 5muF and 10muF capacitor when circuit is ...
Text Solution
|
There exist magnetic field vec(B)=yhat(i)-xhat(j) in space. What is cu...
Text Solution
|
Four metallic plates are sued to form two identical parallel plate cap...
Text Solution
|
There exist uniform magnetic field vec(B)=5T(-hat(j)) from x=0 to x=2m...
Text Solution
|
A man of height h is walking at constant speed v(0) along edge of a st...
Text Solution
|
Current P through a certain non-metallic rod is given as i(0)=0.2V^((3...
Text Solution
|
A drum and its braking system are shown in figure. The drum of radius ...
Text Solution
|
A massless stick of length L is hinged at one end and a mass m attache...
Text Solution
|